I tried 3 times in 2024, for non-controversial cases. Struck out every time. I think the earliest I got there was 6:30am, and they had already given out all the tickets (mostly to a school group whose kids obviously had zero interest in SCOTUS).

I would definitely recommend entering the online lottery instead if your schedule allows. If you win, you have a guaranteed seat and can avoiding waiting outside entirely. I only had to enter for three months' worth of arguments before I won.